Mobile apparatus and control method thereof

ABSTRACT

A mobile apparatus and control method thereof are provided, which includes an audio data signal input unit arranged to receive an audio data signal. An audio output unit is arranged to output an audio signal according to the received audio data signal within a first reproduction frequency. A balanced armature is arranged to output an audio signal according to the received audio data signal within a second reproduction frequency band. The second reproduction frequency band is different from the first reproduction frequency band. An audio signal processor is arranged to adjust the first reproduction frequency band and the second reproduction frequency band such that a combination of the first reproduction frequency band and the second reproduction frequency band is wider than the first reproduction frequency band and the second reproduction frequency band individually.

PRIORITY

This application claims priority under 35 U.S.C. §120 to U.S.application Ser. No. 14/984,777, filed on Dec. 30, 2015, issuing on Dec.20, 2016 as U.S. Pat. No. 9,525,942, and claiming priority under 35U.S.C. §120 to U.S. application Ser. No. 13/959,238, filed on Aug. 5,2013, issuing on Jan. 19, 2016 as U.S. Pat. No. 9,241,215, and claimingpriority under 35 U.S.C. §119(a) to Korean App. Ser. No.10-2012-0085340, which was filed in the Korean Intellectual PropertyOffice on Aug. 3, 2012, the entire contents of each of which areincorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates generally to a mobile apparatus and acontrol method thereof, and more particularly, to a balanced armaturefor effective output and reproduction of an audio data signal.

2. Description of the Related Art

With the development of communication technology for a mobile apparatus,a reproduction frequency band for an audio data signal output from themobile apparatus has been widened.

However, a small audio output means is typically attached to the mobileapparatus to increase the portability of the mobile apparatus. However,the small audio output means produces a sound that is limited to areproduction frequency band corresponding to a receiving sound of atelephone call, and not the widened reproduction frequency banddescribed above.

SUMMARY OF THE INVENTION

The present invention has been made to address at least the aboveproblems and/or disadvantages and to provide at least the advantagesdescribed below. Accordingly, an aspect of the present inventionprovides a mobile apparatus that includes a balanced armature to outputan audio data signal, and a control method thereof.

Another aspect of the present invention provides a mobile apparatus thatincludes a balanced armature, which adjusts a reproduction frequencyband for each of audio output means through an audio signal processorand outputs an audio data signal, and a control method thereof.

In accordance with an aspect of the present invention there is provideda mobile apparatus, comprising: an audio data signal input unit arrangedto receive an audio data signal; an audio output unit arranged to outputan audio signal according the received audio data signal within a firstreproduction frequency band; a balanced armature arranged to output anaudio signal according to the received audio data signal within a secondreproduction frequency band, the second reproduction frequency bandbeing different from the first reproduction frequency band; and an audiosignal processor arranged to adjust the first reproduction frequencyband and the second reproduction frequency band such that a combinationof the first reproduction frequency band and the second reproductionfrequency band is wider than the first reproduction frequency band andthe second reproduction frequency band individually.

In one embodiment, a mobile apparatus comprises an audio data signalinput unit of a mobile apparatus that receives an audio data signal. Themobile apparatus also includes one or more audio output means capable ofoutputting an audio signal of a first reproduction frequency band of thereceived audio data signal, and a balanced armature capable ofoutputting an audio signal of a second reproduction frequency band ofthe received audio data signal. The second reproduction frequency bandbeing different from the first reproduction frequency band. Theapparatus further includes an audio signal processor that adjusts thefirst reproduction frequency band and the second reproduction frequencyband by using one or more filters. A combination of the adjusted firstreproduction frequency band and the adjusted second reproductionfrequency band is wider than the adjusted first reproduction frequencyband and the adjusted second reproduction frequency band individually.

In accordance with another aspect of the present invention there isprovided a method of controlling a mobile apparatus, the methodcomprising the steps of: receiving an audio data signal; adjusting afirst reproduction frequency band of an audio output unit and a secondreproduction frequency band of a balanced armature, the secondreproduction frequency band being different from the first reproductionfrequency band, such that a combination of the first reproductionfrequency band and the second reproduction frequency band is wider thanthe first reproduction frequency band and the second reproductionfrequency band individually; and outputting an audio signal according tothe received audio data signal through an audio output unit within thefirst reproduction frequency band and through a balanced armature withinthe second reproduction frequency band.

In one embodiment, a method of controlling a mobile apparatus isprovided. An audio data signal is received. A first reproductionfrequency band of the received audio data signal and a secondreproduction frequency band of the received audio data signal areadjusted by using one or more filters. The second reproduction frequencyband is different that the first reproduction frequency band. Acombination of the adjusted first reproduction frequency band and theadjusted second reproduction frequency band is wider than the adjustedfirst reproduction frequency band and the adjusted second reproductionfrequency band individually. The audio data signal of the adjusted firstreproduction frequency band is output to one or more audio output means,and the audio data signal of the adjusted second reproduction frequencyband is output to the balanced armature.

Another aspect of the invention provides a computer program comprisinginstructions arranged, when executed, to implement a method inaccordance with any one of the above-described aspects. A further aspectprovides machine-readable storage storing such a program.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other aspects, features, and advantages of the presentinvention will be more apparent from the following detailed descriptionwhen taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a block diagram illustrating a mobile apparatus, according toan embodiment of the present invention;

FIG. 2 is a front view of the mobile apparatus, according to anembodiment of the present invention;

FIG. 3 is an internal block diagram of the mobile apparatus, accordingto the embodiment of the present invention;

FIGS. 4A and 4B are diagrams illustrating a reproduction frequency bandof a mobile apparatus having one audio output means;

FIGS. 5A and 5B are diagrams illustrating a reproduction frequency bandof the mobile apparatus, according to an embodiment of the presentinvention;

FIGS. 6A to 6C are diagrams illustrating an adjustment of a firstreproduction frequency band by an audio signal processor, according toan embodiment of the present invention;

FIGS. 7A to 7C are diagrams illustrating an adjustment of a secondreproduction frequency band by an audio signal processor, according toan embodiment of the present invention;

FIG. 8 is a diagram illustrating a frequency spectrum in which afrequency spectrum of the audio output means is combined with afrequency spectrum of a balanced armature, according to an embodiment ofthe present invention;

FIG. 9 is an internal block diagram of a mobile apparatus, according toan embodiment of the present invention;

FIGS. 10A to 10C are diagrams illustrating crossover frequencies,according to an embodiment of the present invention;

FIG. 11 is an internal block diagram of a mobile apparatus, according toan embodiment of the present invention;

FIG. 12A to 12C are diagrams illustrating a frequency spectrum duringreproduction of a wide band, according to an embodiment of the presentinvention;

FIGS. 13A to 13C are diagrams illustrating simultaneous use of a dynamicreceiver and a balanced armature in a narrow band reproduction frequencyband, according to an embodiment of the present invention;

FIG. 14 is a diagram illustrating a frequency response used in the audiooutput means by a band pass filter, according to an embodiment of thepresent invention;

FIGS. 15A and 15B are diagrams illustrating a process of performing anadjustment of a reproduction frequency band, according to an embodimentof the present invention;

FIG. 16 is a flowchart illustrating a control method of the mobileapparatus, according to the embodiment of the present invention;

FIG. 17 is a flowchart illustrating a control method of the mobileapparatus, according to an embodiment of the present invention;

FIG. 18 is a flowchart illustrating a control method of the mobileapparatus, according to an embodiment of the present invention;

FIG. 19 is a flowchart illustrating a control method of the mobileapparatus, according to an embodiment of the present invention; and

FIG. 20 is a flowchart illustrating a control method of the mobileapparatus, according to an embodiment of the present invention.

DETAILED DESCRIPTION OF EMBODIMENTS OF THE PRESENT INVENTION

Embodiments of the present invention are described in detail withreference to the accompanied drawings. The same or similar componentsmay be designated by the same or similar reference numerals althoughthey are illustrated in different drawings. Detailed descriptions ofconstructions or processes known in the art may be omitted to avoidobscuring the subject matter of the present invention.

Terms including an ordinary number, such as first and second, are usedfor describing various constituent elements, but the constituentelements are not limited by the terms. The terms are used only todiscriminate one constituent element from another constituent element.For example, without departing from the scope of the invention, a firstconstituent element may be named as a second constituent element, andsimilarly a second constituent element may be named as a firstconstituent element. A term “and/or” includes a combination of multiplerelevant described items or any one of the multiple relevant describeditems.

It should be understood that when one constituent element referred to asbeing “coupled to” or “connected to” another constituent element, oneconstituent element can be directly coupled to or connected to the otherconstituent element, but intervening elements may also be present. Incontrast, when one constituent element is “directly coupled to” or“directly connected to” another constituent element, it should beunderstood that there are no intervening element present.

Terms used in the present application are used only to describe specificembodiments, and are not intended to limit the present invention.Singular expressions used herein include plural expressions unless theyhave definitely opposite meanings. In the present application, it willbe appreciated that terms “including” and “having” are intended todesignate the existence of characteristics, numbers, steps, operations,constituent elements, and components described in the specification or acombination thereof, and do not exclude a possibility of the existenceor addition of one or more other specific characteristics, numbers,steps, operations, constituent elements, and components, or acombination thereof in advance.

All terms used herein including technical or scientific terms have thesame meanings as meanings that are generally understood by those skilledin the art unless they are differently defined. Terms defined in agenerally used dictionary shall be construed as having meanings matchingthose in the context of a related art, and shall not be construed inideal or excessively formal meanings unless they are clearly defined inthe present application.

Throughout the description and claims of this specification, the words“comprise” and “contain” and variations of the words, for example“comprising” and “comprises”, means “including but not limited to”, andis not intended to (and does not) exclude other components, integers orsteps.

Throughout the description and claims of this specification, thesingular encompasses the plural unless the context otherwise requires.In particular, where the indefinite article is used, the specificationis to be understood as contemplating plurality as well as singularity,unless the context requires otherwise.

Features, integers or characteristics described in conjunction with aparticular aspect, embodiment or example of the invention are to beunderstood to be applicable to any other aspect, embodiment or exampledescribed herein unless incompatible therewith.

It will be also be appreciated that, throughout the description andclaims of this specification, language in the general form of “X for Y”(where Y is some action, activity or step and X is some means forcarrying out that action, activity or step) encompasses means X adaptedor arranged specifically, but not exclusively, to do Y.

FIG. 1 is a schematic block diagram illustrating a mobile apparatus,according to an embodiment of the present invention.

Referring to FIG. 1, a mobile apparatus 100 may be connected with anexternal device by using a mobile communication module 120, a sub-rangecommunication module 130, and a connector 165. The external device maybe another device, such as, for example, a portable phone, a smartphone, a tablet Personal Computer (PC), and a server.

Referring to FIG. 1, the apparatus 100 includes a controller 110, themobile communication module 120, the sub-range communication module 130,a multimedia module 140, a camera module 150, a Global Position System(GPS) module 155, an input/output module 160, a sensor module 170, astorage unit 175, a power supply unit 180, and a display unit 190. Thesub-range communication module 130 includes at least one of a wirelessLocal Area Network (LAN) module 131 and a Near Field Communication (NFC)module 132. The multimedia module 140 includes at least one of abroadcasting communication module 141, an audio reproduction module 142,and a video reproduction module 143. The camera module 150 includes atleast one of a first camera 151 and a second camera 152. Theinput/output module 160 includes at least one of a button 161, amicrophone 162, a speaker 163, an audio output means 164, a vibrationmotor 167, the connector 165, and a keypad 166.

The controller 110 may include a Central Processing Unit (CPU) 111, aRead Only Memory (ROM) 112 for storing a control program for controllingthe mobile apparatus 100, and a Random Access Memory (RAM) 113 forstoring a signal or data input from the outside of the mobile apparatus100 or used as a storage area for work performed by the mobile apparatus100. The CPU 111 may include a single core, dual cores, triple cores, orquad cores. The CPU 111, the ROM 112, and the RAM 113 may be connectedwith each other through an internal bus.

The controller 110 may control the mobile communication module 120, thesub-range communication module 130, the multimedia module 140, thecamera module 150, the GPS module 155, the input/output module 160, thesensor module 170, the storage unit 175, the power supply unit 180, andthe display unit 190. The controller 110 may include an audio datasignal input unit 300 (FIG. 3), an audio signal processor 310 (FIG. 3),a crossover frequency changing unit 900 (FIG. 9), an audio output meansuse determination unit 1100 (FIG. 11), and a reproduction frequency bandadjustment input unit 1110 (FIG. 11), which are described in greaterdetail below. The audio data signal input unit 300, the audio signalprocessor 310, the crossover frequency changing unit 900, the audiooutput means use determination unit 1100, and the reproduction frequencyband adjustment input unit 111 may be separately formed, and thecontroller 110 may control the same.

The mobile communication module 120 permits the mobile apparatus 100 tobe connected with an external device through mobile communication byusing at least one an antenna or a plurality of antennas according tothe control of the controller 110. The mobile communication module 120transceives a wireless signal for a voice call, a video call, a ShortMessage Service (SMS), or a Multimedia Messaging Service (MMS) with aportable phone, a smart phone, a tablet PC, or another device having atelephone number input in the mobile apparatus 100.

The sub-range communication module 130 may include at least one of thewireless LAN module 131 and the NFC module 132. For example, thesub-range communication module 130 may include only the wireless LANmodule 131, only the NFC module 132, or both the wireless LAN module 131and the NFC module 132.

The wireless LAN module 131 may be connected to the Internet at a placewhere a wireless Access Point (AP) is installed according to the controlof the controller 110. The wireless LAN module 131 may support thewireless LAN standard (IEEE802.11x) of the Institute of Electrical andElectronics Engineers (IEEE). The NFC module 132 may wirelessly performNFC between the mobile apparatus 100 and an image forming device,according to the control of the controller 110. The NFC method mayinclude Bluetooth or infrared communication (infrared data association(IrDA)).

The mobile apparatus 100 may include at least one of the mobilecommunication module 120, the wireless LAN module 131, and the NFCmodule 132 according to performance. For example, the mobile apparatus100 may include a combination of the mobile communication module 120,the wireless LAN module 131, and the NFC module 132 according toperformance.

The multimedia module 140 may include the broadcasting communicationmodule 141, the audio reproduction module 142, or the video reproductionmodule 143. The broadcasting communication module 141 may receive abroadcasting signal (for example, a Television (TV) broadcasting signal,a radio broadcasting signal, or a data broadcasting signal) andbroadcast additional information (for example, an Electric Program Guide(EPG) or an Electric Service Guide (ESG)) transmitted from abroadcasting station through a broadcasting communication antenna,according to the control of the controller 110. The audio reproductionmodule 142 may reproduce a digital audio file (for example, a filehaving a file extension of mp3, wma, ogg, or way) stored or receivedaccording to the control of the controller 110. The video reproductionmodule 143 may reproduce a digital video file (for example, a filehaving a file extension of mpeg, mpg, mp4, avi, mov, or mkv) stored orreceived according to the control of the controller 110. The videoreproduction module 143 may reproduce a digital audio file.

The multimedia module 140 may include the audio reproduction module 142and the video reproduction module 143, but not the broadcastingcommunication module 141. Further, the audio reproduction module 142 orthe video reproduction module 143 of the multimedia module 140 may beincluded in the controller 110.

The camera module 150 may include at least one of a first camera 151 anda second camera 152 for storing a still image or a video. Further, thefirst camera 151 or the second camera 152 may include an auxiliary lightsource (for example, a flash) for providing a light quantity necessaryfor the photographing. The first camera 151 may be disposed on a frontsurface of the mobile apparatus 100, and the second camera 152 may bedisposed in a rear surface of the mobile apparatus 100. Differently, thefirst camera 151 and the second camera 152 are adjacently disposed tophotograph a 3-dimensional still image or a 3-dimensional video.

The GPS module 155 may receive radio waves from a plurality of GPSsatellites, and calculate a position of the mobile apparatus 100 byusing a time of arrival of the radio waves from the GPS satellites tothe mobile apparatus 100. The position of the mobile apparatus 100calculated from the GPS module 155 may be expressed with at least one oflatitude, longitude, height, and 3-dimensional orientation.

The input/output module 160 may include at least one of a plurality ofbuttons 161, the microphone 162, the speaker 163, the audio output means164, the connector 165, the keypad 166, and the vibration motor 167.

The button 161 may be formed on a front surface, a side surface, or arear surface of a housing of the mobile apparatus 100, and may includeat least one of a power/lock button, a volume button, a menu button, ahome button, and a back button.

The microphone 162 generates an electrical signal by receiving a voiceor a sound according to the control of the controller 110. Themicrophone 162 may receive a voice of a user for voice communicationservices.

The speaker 163 may output sounds corresponding to various signals (forexample, a wireless signal, a broadcasting signal, a digital audio file,a digital video file, or photography) of the mobile communication module120, the sub-range communication module 130, the multimedia module 140,or the camera module 150 to the outside of the mobile apparatusaccording to the control of the controller 110. The speaker 163 mayoutput a sound (for example, a button operation sound or a callconnection sound corresponding to a telephone call) corresponding to afunction performed by the mobile apparatus 100. One or a plurality ofspeakers 163 may be formed at an appropriate position or appropriatepositions of the housing of the mobile apparatus 100.

The audio output means (receiver) 164 may reproduce an audio data signalaccording to the mobile communication module 120 and output thereproduced audio data signal to the outside of the mobile apparatus 100,according to the control of the controller 110. One or a plurality ofaudio output means 164 (also referred to herein as audio output units164) may be formed at an appropriate position or appropriate positionsupon the housing of the mobile apparatus 100.

The connector 165 may be used as an interface for connecting the mobileapparatus 100 and an external device or a power source. Data stored inthe storage unit 175 of the mobile apparatus 100 may be transmitted toan external device or data may be received from an external devicethrough a wired cable connected to the connector 165, according to thecontrol of the controller 110. Power may be input or a battery may becharged from the power source through the wired cable connected to theconnector 165.

The keypad 166 may receive a key input from the user for the control ofthe mobile apparatus 100. The keypad 166 includes a physical keypadprovided at the mobile apparatus 100 or a virtual keypad displayed onthe display unit 190. In some embodiments a physical keypad may not beprovided.

The vibration motor may convert an electrical signal to a mechanicalvibration, according to the control of the controller 110. For example,in a case where the mobile apparatus 100 in a vibration mode receives avoice call from another device, the vibration motor is operated. One ora plurality of vibration motors may be formed inside the housing of themobile apparatus 100. The vibration motor may be operated in response toa user's touch motion of touching the display unit 190 and a successivemotion of a touch on the display unit 190.

The sensor module 170 includes at least one sensor for detecting a stateof the mobile apparatus 100. For example, the sensor module 170 mayinclude a proximity sensor for detecting whether a user approaches themobile apparatus 100, an illumination sensor for detecting a quantity oflight at the vicinity of the mobile apparatus 100, or a motion sensorfor detecting an operation of the mobile apparatus 100 (for example, arotation of the mobile apparatus 100, and acceleration or vibrationapplied to the mobile apparatus 100). At least one sensor may detect astate of the mobile apparatus 100, generate a signal corresponding tothe detection, and transmit the generated signal to the controller 110.The sensor of the sensor module 170 may be added or removed according toperformance of the mobile apparatus 100.

The storage unit 175 may store an input/output signal or data incorrespondence with an operation of the mobile communication module 120,the sub communication module 130, the multimedia module 140, the cameramodule 150, the GPS module 155, the input/output module 160, the sensormodule 170, and the display unit 190 according to the control of thecontroller 110. The storage unit 175 may store a control program andapplications for the control of the mobile apparatus or the controller110.

The term “storage unit” includes the storage unit 175, the ROM 112 andthe RAM 113 within the controller 110, or a memory card (for example, anSD card and a memory stick) mounted on the mobile apparatus 100. Thestorage unit may include a non-volatile memory, a volatile memory, aHard Disk Drive (HDD), or a Solid State Drive (SSD).

The power supply unit 180 may supply power to one or a plurality ofbatteries disposed in the housing of the mobile apparatus 100, accordingto the control of the controller 110. One or the plurality of batteriessupply power to the mobile apparatus 100. Further, the power supply unit180 may supply power input from an external power source to the mobileapparatus 100 through the wired cable connected with the connector 165.

The display unit 190 may display an image of the mobile apparatusprovided according to the control of the controller 110. The displayunit 190 may include a touch screen, and the touch screen may provideuser interfaces corresponding to various services (for example, a call,data transmission, broadcasting, and photographing) to the user. Thetouch screen may transmit an analog signal corresponding to at least onetouch input in the user interface to the controller 110. The touchscreen may receive at least one touch through a body part of the user(for example, a finger including a thumb) or an input means (forexample, a stylus pen) capable of generating a touch. Further, the touchscreen may receive a successive motion of one touch among one or moretouches. The touch screen may transmit an analog signal corresponding toan input of successive motion of a touch to the controller 110.

In an embodiment of the present invention, a touch is not limited to acontact between the touch screen and the body of the user or the inputmeans capable of generating a touch, and may include a non-contact (forexample, a detectable interval between the touch screen and the body ofthe user or the input means capable of generating a touch is equal to orlower than a predetermined interval). The detectable interval in thetouch screen may be changed according to performance or a structure ofthe mobile apparatus 100. The touch screen may be implemented by, forexample, a resistive method, a capacitive method, an infrared method, oran ultrasonic wave (acoustic wave) method.

The controller 110 may convert an analog signal received from the touchscreen to a digital signal (for example, X and Y coordinates). Thecontroller 110 may control the display unit 190 by using the digitalsignal. For example, the controller 110 may allow a shortcut icondisplayed on the display unit 190 to be selected or execute the shortcuticon in response to the touch.

FIG. 2 is a front view of the mobile apparatus, according to anembodiment of the present invention.

Referring to FIG. 2, the mobile apparatus 100 includes at least oneaudio output means 164. The audio output means 164 provides the userwith a receiving sound by reproducing the audio data signal andoutputting the reproduced audio data signal to the mobile apparatus 100.The mobile apparatus 100 may include a first audio output means 200, asecond audio output means 202, a third audio output means, and the like.While FIG. 2 illustrates an example in which two audio output means,including the first audio output means 200 and the second audio outputmeans 202, are provided, the present invention is not limited thereto.Further, the audio output means may be formed from any known type. Forinstance, the audio output means may comprises a dynamic receiver (alsoreferred to as an ear-piece speaker) or a balanced armature (commonlyused in headphone speakers). Various other types of existing audiooutput means including receivers may be used as the receiver, and thetype of the receiver may be easily recognized by those skilled in theart. The dynamic receiver makes current flow in a coil attached to avibration plate, vibrates the vibration plate by using a permanentmagnet, and reproduces an audio data signal. The dynamic receiver is atype of transducer that uses a vibration plate connected to a centralcoil vertically moving within a magnetic field generated by a permanentmagnet, so that an electrical signal is converted to a sound signal by avibration of the vibration plate. The dynamic receiver has acharacteristic of effectively reproducing a reproduction frequency bandof a low band and a middle band. The balanced armature is a type oftransducer in which an electrical signal is input in an armature aroundwhich a coil is wound, and a connected vibration plate vibrates whilemoving between permanent magnets, so that a receiving sound isreproduced. The balanced armature has a characteristic of effectivelyreproducing a reproduction frequency band of a high band. Accordingly,according to an embodiment of the present invention, the reproductionfrequency bands of both a low frequency band and a high frequency bandare reproduced by simultaneously operating the dynamic receiverreproducing the lower range band and the balanced armature reproducingthe high frequency band. Accordingly, a user is effectively providedwith a receiving sound in all of the reproduction frequency bands.

FIG. 3 is an internal block diagram of the mobile apparatus, accordingto an embodiment of the present invention.

Referring to FIG. 3, the mobile apparatus includes the audio data signalinput unit 300, the audio signal processor 310, the at least one audiooutput means 200, and the balanced armature 202. From the abovediscussion, that the at least one audio output means 200 may itself be abalanced armature, in which case there would be two balanced armatures.Alternatively, the at least one audio output means may be formed ofvarious receivers, such as, for example, a dynamic receiver and abalanced armature. Accordingly, according to an embodiment of thepresent invention, an audio data signal may be output through the atleast one audio output means 200 and the balanced armature 202, which isone of the types of the audio output means. The balanced armature 202may be positioned in the vicinity of the at least one audio output means200. Further, the number of the at least one audio output means 200 maybe plural, so that the at least one audio output means 200 may include afirst audio output means, a second audio output means, a third audiooutput means, and an N^(th) audio output means. However, the presentinvention is described below based on the first audio output means.Further, the audio data signal input unit 300 and the audio signalprocessor 310 may be included in the controller 110 as illustrated inFIG. 3, or may be separately formed to be controlled by the controller110.

The audio data signal input unit 300 is included in the mobile apparatus100, is controlled by the controller 110, and receives an audio datasignal. The audio data signal input unit may include a mobilecommunication data receiving unit 302. The mobile communication datareceiving unit 302 may receive the audio data signal by using voicecommunication services of a mobile communication network. The audio datasignal is generated based on a voice frequency band. The audio datasignal is an electrical signal including information on a soundreproduced by the audio output means of the mobile apparatus 100 toreproduce a sound such that it is audible to the user outside of themobile apparatus 100, and provided to the user. For example, the audiodata signal may be an electrical signal including information on a voiceor a sound of another user of an external mobile apparatus receivedthrough the mobile communication data receiving unit 302 using thecommunication module 120 and 130 of the mobile apparatus 100. A voice orsound signal of another user of the external mobile apparatus isconverted to an electrical signal inside the external mobile apparatus,and the converted electrical signal is received in the mobile apparatus100 through the mobile communication data receiving unit 302 using thecommunication module. The electrical signal received in the mobileapparatus 100 of the user may be an audio data signal output to theoutside of the mobile apparatus and provided to the user.

The first audio output means 200 and the balanced armature 202 receivethe audio data signal from the audio signal processor 310 and reproducethe received audio data signal, thereby outputting the audio data signalto the outside of the mobile apparatus and providing the audio datasignal to the user. The first audio output means 200 may reproduce afirst reproduction frequency band of the audio data signal, and thebalanced armature 202 may reproduce a second reproduction frequency bandof the audio data signal. The first reproduction frequency band and thesecond reproduction frequency band may be different from each other, butmay have an overlapping band.

FIGS. 4A and 4B are diagrams illustrating a mobile apparatus includingan audio output means and a reproduction frequency band of a mobileapparatus including one audio output means. FIGS. 5A and 5B are diagramsillustrating a reproduction frequency band of the mobile apparatusincluding the balanced armature, according to an embodiment of thepresent invention. FIG. 4A illustrates a mobile apparatus 400 includingone audio output means 402. FIG. 4B illustrates a frequency spectrum 412of an audio data signal reproduced in the one audio output means 402. Inthe graph of FIG. 4B, the X-axis is frequency, and the Y-axis isSoundPressure Level (SPL). Accordingly, the graph of FIG. 4B represents thespectrum 412 in which an SPL according to a frequency of the one audiooutput means 402 is represented. A band reproducible by the one audiooutput means 402 is designated by reproduction frequency band 420 inFIG. 4B. The reproduction frequency band is considered to be thefrequency band in which an audio data signal can be effectivelyconverted to an output audio signal at a sufficiently high volume. Thereproduction frequency band can be used to filter an audio data signalbefore it is passed to the audio output means.

FIG. 5A illustrates the mobile apparatus 100 including the balancedarmature, according to an embodiment of the present invention. Further,FIG. 5B illustrates frequency spectrums 210 and 212 of audio datasignals reproduced in the first audio output means 200 and the balancedarmature 202, respectively. In the graph of FIG. 5B, the X-axis isfrequency, and the Y-axis is SPL. Accordingly, the graph of FIG. 5Brepresents the spectrums 210 and 212 in which SPLs according tofrequencies of the first audio output means and the balanced armatureare represented. Further, FIG. 5B illustrates a first reproductionfrequency band 510 reproduced in the first audio output means 200, and asecond reproduction frequency band 512 reproduced in the balancedarmature 202. In the mobile apparatus, according to an embodiment of thepresent invention, the frequency spectrum 210 of the first audio outputmeans 200 is combined with the frequency spectrum 212 of the balancedarmature 202 to produce frequency spectrum 214. According to thecombined frequency spectrum 214, a reproduction frequency band 500 iswider than the reproduction frequency band 420 of the mobile apparatushaving the one audio output means in FIG. 4B. Accordingly, according toan embodiment of the present invention, the reproduction frequency bandin which the audio data signal is reproduced is widened by using theplurality of audio output means.

The audio signal processor 310, included in the mobile apparatus 100, iscontrolled by the controller 110, and adjusts the first reproductionfrequency band of the first audio output means 200 and the secondreproduction frequency band of the balanced armature 202 by using atleast one filter. At least one filter may perform filtering according toa frequency.

FIGS. 6A to 6C are diagrams illustrating adjustment of the firstreproduction frequency band of the first audio output means by the audiosignal processor, according to an embodiment of the present invention.FIGS. 7A to 7C are diagrams illustrating adjustment of the secondreproduction frequency band of the balanced armature by the audio signalprocessor, according to an embodiment of the present invention. FIG. 6Aillustrates a spectrum 610 representing an SPL according to a frequencyof an audio data signal of the first audio output means 200. FIG. 6Billustrates a frequency response graph for a Low Pass Filter (LPF) 620used in the audio signal processor 310. The audio signal processor 310may adjust the first reproduction frequency band of the first audiooutput means by cutting a high frequency band reproduced in the firstaudio output means 200 and performing filtering for maintaining a lowfrequency band, by using the LPF illustrated in FIG. 6B. Accordingly,FIG. 6C illustrates a spectrum 630 representing an SPL according to afrequency for the audio data signal filtered by the LPF 620. Comparing areproduction frequency band 640 before the filtering in FIG. 6A with areproduction frequency band 650 after the filtering in FIG. 6C, it isevident that the high frequency band is cut and the low frequency bandis maintained.

FIG. 7A illustrates a spectrum 710 representing an SPL according to afrequency of an audio data signal of the balanced armature 202. FIG. 7Billustrates a frequency response graph for a High Pass Filter (HPF) 720used in the audio signal processor 310. The audio signal processor 310may adjust the second reproduction frequency band of the balancedarmature by cutting the low frequency band reproduced in the balancedarmature 202 and performing filtering for maintaining the high frequencyband, by using the HPF as illustrated in FIG. 7B. Accordingly, FIG. 7Cillustrates a spectrum 730 representing an SPL according to a frequencyfor the audio data signal filtered by the high pass filter 720.Comparing a reproduction frequency band 740 before the filtering in FIG.7A with a reproduction frequency band 750 after the filtering in FIG.7C, it is evident that the low frequency band is cut and the highfrequency band is maintained.

FIG. 8 represents a frequency spectrum 800 in which the frequencyspectrum 630 of the first audio output means and the frequency spectrum730 of the balanced armature are combined. Accordingly, when the audiodata signal is reproduced by the first audio output means and thebalanced armature, according to an embodiment of the present invention,the audio data signal may be reproduced without a dip in the widereproduction frequency band, as illustrated in FIG. 8. Accordingly, themobile apparatus including the balanced armature, according to anembodiment of the present invention, may advantageously reproduce theaudio data signal by adjusting the reproduction frequency band for eachof the plurality of audio output means through the audio signalprocessor.

FIG. 9 is an internal block diagram of a mobile apparatus, according toan embodiment of the present invention.

Referring to FIG. 9, the mobile apparatus includes the crossoverfrequency changing unit 900, in addition to the audio data signal inputunit 300, the audio signal processor 310, the at least one audio outputmeans 200, and the balanced armature 202. The crossover frequencychanging unit 900 may be included in the controller 110, or may beseparately provided to be controlled by the controller 110. The audiodata signal input unit 300, the audio signal processor 310, the audiooutput means 200, and the balanced armature 202 are the same as thosedescribed above with respect to FIGS. 3 to 8.

The crossover frequency changing unit 900 changes a crossover frequencyat which a frequency response of a first filter used for adjusting thereproduction frequency band of the first audio output means crosses afrequency response of a second filter used for adjusting thereproduction frequency band of the balanced armature, by the audiosignal processor.

FIGS. 10A to 10C are diagrams illustrating crossover frequencies,according to an embodiment of the present invention. FIG. 10A representsa frequency response 1010 of the first filter used for adjusting thereproduction frequency band of the first audio output means and afrequency response 1020 of the second filter used for adjusting thereproduction frequency band of the balanced armature, by the audiosignal processor. A frequency at a point at which the frequency response1010 of the first filter crosses the frequency response 1020 of thesecond filter is a crossover frequency 1030. The crossover frequencychanging unit 900 may increase or decrease the crossover frequency bychanging the crossover frequency. FIG. 10B illustrates an example inwhich the crossover frequency is increased. When increased to crossoverfrequency 1032, an application range of a frequency response 1012 of thefirst filter used for adjusting the reproduction frequency band of thefirst audio output means is widened compared to that of FIG. 10A.Additionally, an application range of a frequency response 1022 of thesecond filter used for adjusting the reproduction frequency band of thebalanced armature is narrowed compared to that of FIG. 10A. Thus, whenthe crossover frequency is increased, as shown in FIG. 10B, theapplication range of the low pass filter, which is the first filter, iswidened, and the application range of the high pass filter, which is thesecond filter, is narrowed. The application of the low pass filter isincreased compared to that of FIG. 10A, and the low frequency band isemphasized and filtered. Accordingly, the low frequency band isemphasized and reproduced in the first audio output means and thebalanced armature, so that the audio data signal may be output to theuser.

FIG. 10C illustrates an example in which the crossover frequency isdecreased. When decreased to crossover frequency 1034, an applicationrange of a frequency response 1014 of the first filter used foradjusting the reproduction frequency band of the first audio outputmeans is narrowed compared to that of FIG. 10A. Additionally, anapplication range of a frequency response 1024 of the second filter usedfor adjusting the reproduction frequency band of the balanced armatureis widened compared to that of FIG. 10A. Thus, when the crossoverfrequency is decreased, as shown in FIG. 10C, the application range ofthe low pass filter, which is the first filter, is narrowed, and theapplication range of the high pass filter, which is the second filter,is widened. The application range of the high pass filter is increasedcompared to that of FIG. 10A, and the high frequency band is emphasizedand filtered. Accordingly, the high frequency band is emphasized andreproduced in the first audio output means and the balanced armature, sothat the audio data signal may be output to the user. According toanother embodiment of the present invention, it is possible to operatethe receiver by changing the emphasized range band through the change inthe crossover frequency. Further, the change of the crossover frequencymay be determined by receiving an input of the user.

FIG. 11 is an internal block diagram of a mobile apparatus, according toan embodiment of the present invention.

Referring to FIG. 11, the mobile apparatus further includes an audiooutput means use determination unit 1100 and a reproduction frequencyband adjustment input unit 1110, in addition to the audio data signalinput unit 300, the audio signal processor 310, the at least one audiooutput means 200, and the balanced armature 202 shown in FIG. 3. Each ofthe audio output means use determination unit 1100 and the reproductionfrequency band adjustment input unit 1110 may be included in thecontroller 110, or may be separately formed to be controlled by thecontroller 110. The audio data signal input unit 300, the audio signalprocessor 310, the audio output means 200, and the balanced armature 202are the same as those described in detail above with respect to FIGS. 3to 8.

The audio output means use determination unit 1100 determines whether touse the first audio output means 200 and the balanced armature 202.Accordingly, when the audio output means use determination unit 1100determines to use the first audio output means 200 and not to use thebalanced armature 202, the audio data signal may be reproduced only inthe first audio output means and then provided to the user. Whether touse each audio output means may be determined by receiving an input fromthe user.

The reproduction frequency band adjustment input unit 1110 receives aninput for adjusting the first reproduction frequency band of the firstaudio output means 200 and the second reproduction frequency band of thebalanced armature 202. An input for adjusting the first reproductionfrequency band of the first audio output means 200 and the secondreproduction frequency band of the balanced armature 202 may be receivedfrom the user through the reproduction frequency band adjustment inputunit 1110. The reproduction frequency band adjustment input unit 1110may receive an input for adjusting the first reproduction frequency bandof the first audio output means 200 and the second reproductionfrequency band of the balanced armature 202 from the user by using thebuttons 161, the keypad 166, or the touch screen included in the inputmodule 160 of the mobile apparatus 100.

The mobile apparatus including the balanced armature, according toanother embodiment of the present invention, may further include a wideband determination unit for determining whether wide band voice callservices, in which a wide band reproduction frequency band is supported,are available in the mobile apparatus.

The wide band reproduction frequency band has an audio data signalreproduction frequency band wider than a narrow band reproductionfrequency band. The wide band reproduction frequency band may be 50 to7,000 Hz, and the narrow band reproduction frequency band may be 300 to3,400 Hz. Further, whether voice channel information on the audio datasignal is the wide band reproduction frequency band may be determinedthrough communication with a base station or by determining a carrier byusing the communication modules 120 and 132 or the GPS module 155included in the mobile apparatus.

The controller 110 may receive information indicating that the wide bandvoice call services in which the wide band reproduction frequency bandis supported are available in the mobile apparatus from the wide banddetermination unit by controlling the wide band determination unit. Forexample, a case where the first audio output means 200 reproducing thefirst reproduction frequency band is the dynamic receiver forreproducing a low frequency band, and the balanced armature 202reproducing the second reproduction frequency band reproduces a highfrequency band is described in detail below. The controller 110 uses allof the first audio output means 200 and the balanced armature 202 bycontrolling the audio output means use determination unit 1100 describedin FIG. 11. The reproduction for the high frequency band, as well as thelow frequency band, is supported in the wide band reproduction frequencyband, so that it is necessary to use both the first audio output means200 and the balanced armature 202.

The controller 110 may adjust the first reproduction frequency band byusing the low pass filter for the dynamic receiver, which is the firstaudio output means, and the second reproduction frequency band by usingthe high pass filter for the balanced armature, by controlling the audiosignal processor 310.

A spectrum 1200 representing an SPL according to the frequency for thefirst audio output means 200 and a spectrum 1202 representing an SPLaccording to the frequency for the balanced armature are illustrated inFIG. 12A.

A frequency response 1210 for the low pass filter used in the firstaudio output means 200 and a frequency response 1220 for the high passfilter used in the balanced armature 202 are illustrated in FIG. 12B. Afrequency at a point at which the frequency response 1210 for the lowpass filter used in the first audio output means 200 crosses thefrequency response 1220 for the high pass filter used in the balancedarmature 202 is illustrated as a crossover frequency 1230.

A spectrum 1240 representing an SPL according to the frequency for thefirst reproduction frequency band, a spectrum 1250 representing an SPLaccording to the frequency for the adjusted second reproductionfrequency band, and a spectrum 1260 representing an SPL according to thefrequency in which the first reproduction frequency band is combinedwith the second reproduction frequency band, are illustrated in FIG.12C.

Accordingly, referring to FIGS. 12A-12C, when the wide band voicecommunication services in which the wide band reproduction frequencyband is supported are available in the mobile apparatus, the controller110 may adjust the reproduction frequency band for the first audiooutput means and the balanced armature by controlling the audio signalprocessor 310. The audio data signal for the low frequency band and thehigh frequency band are then reproduced and the user is provided withthe reproduced audio data signal as illustrated in FIG. 12C.

Further, the controller 110 may receive information indicating that thewide band voice call services in which the wide band reproductionfrequency band is supported are not available in the mobile apparatusfrom the wide band determination unit by controlling the wide banddetermination unit. In this case, the controller 110 may output theentire reproduction frequency bands of the audio data signal received inany one of the first audio output means 200 or the balanced armature202. For example, the controller 110 may receive the informationindicating that the first audio output means 200 is used and thebalanced armature 202 is not used from the audio output means usedetermination unit 1100. Since a region in which the wide bandreproduction frequency band is not supported corresponds to a narrowband reproduction frequency band, and a relatively narrow high frequencyband is supported in the narrow band reproduction frequency band, theaudio output means use determination unit 1100 may transmit theinformation indicating that the balanced armature corresponding to thehigh frequency band is not used to the controller 110.

However, even when the controller 110 receives the informationindicating that the mobile apparatus is positioned in a region in whichthe wide band reproduction frequency band is not supported from the wideband determination unit by controlling the wide band determination unit,the controller 110 may receive the information indicating that thebalanced armature 202 is used from the audio output means usedetermination unit 1100. This may occur when the high frequency band issupported by a predetermined region even in a case where the mobileapparatus is present in the narrow band reproduction frequency band. Thecontroller 110 may decrease the crossover frequency by controlling thecrossover frequency determination unit 900. When the crossover frequencyis decreased, the reproduction for the high frequency band is relativelyabundant because the high frequency band in the narrow band reproductionfrequency band is supported narrowly. Accordingly, the controller 110may improve the reproduction for the high frequency band by decreasingthe crossover frequency.

FIGS. 13A to 13C are diagrams illustrating a case where the dynamicreceiver and the balanced armature are simultaneously used in the narrowband reproduction frequency band, according to an embodiment of thepresent invention. Referring to FIGS. 13A to 13C, a spectrum 1300representing an SPL according to the frequency for the first audiooutput means 200 and a spectrum 1302 representing an SPL according tothe frequency for the balanced armature 202 are illustrated in FIG. 13A.Further, a frequency response 1310 for the low pass filter used in thefirst audio output means 200 and a frequency response 1320 for the highpass filter used in the balanced armature 202 are illustrated in FIG.13B. A frequency at a point at which the frequency response 1310 for thelow pass filter used in the first audio output means 200 crosses thefrequency response 1320 for the high pass filter used for the balancedarmature 202 is illustrated as a crossover frequency 1330. The crossoverfrequency 1330 is decreased compared to the crossover frequency 1230 ofFIG. 12B. This is a result of the improvement of the reproduction forthe high frequency band by decreasing the crossover frequency bycontrolling the crossover frequency changing unit 900.

A spectrum 1340 representing an SPL according to the frequency for thefirst reproduction frequency band, a spectrum 1350 representing an SPLaccording to the frequency for the adjusted second reproductionfrequency band, and a spectrum 1360 representing an SPL according to thefrequency in which the first reproduction frequency band is combinedwith the second reproduction frequency band, are illustrated in FIG.13C. As illustrated in FIG. 12C, according to another embodiment of thepresent invention, when the mobile apparatus is positioned in the narrowband reproduction region, not only the dynamic receiver but also thebalanced armature are operated. Filtering is performed so that the highfrequency band is abundantly reproduced, thereby outputting thereproduction of the audio data signal abundant even in the highfrequency band compared to a spectrum 1370 representing an SPL accordingto the frequency at which only one dynamic receiver is operated.

The mobile apparatus, according to another embodiment of the presentinvention, may further include a surrounding environment noisedetermination unit for determining a noise for a surrounding environmentof the mobile apparatus.

The surrounding environment noise determination unit may determine anoise of the surrounding environment by using the sensor module 170 orthe microphone 162 included in the input/output module 160 of the mobileapparatus 100. Further, the surrounding environment noise determinationunit may determine whether the noise belongs to the high frequency bandor the low frequency band. Accordingly, when the surrounding environmentnoise determination unit determines that the noise of the surroundingenvironment of the mobile apparatus has a level greater than or equal toa predetermined level, the controller 110 may change the crossoverfrequency by controlling the crossover frequency changing unit 900. Forexample, a case where the dynamic receiver, which is the first audiooutput means, and the balanced armature are used is described in detailbelow.

When the surrounding environment noise determination unit determinesthat the noise belongs to the low frequency band, the controller 110 mayincrease the audio reproduction through the balanced armature 202 inwhich the reproduction for the high frequency band is effective byreducing the crossover frequency. On the contrary, when the surroundingenvironment noise determination unit determines that the noise belongsto the high frequency band, the controller 110 may increase the audioreproduction through the dynamic receiver, which is the first audiooutput means 200, in which the reproduction for the low frequency bandis effective by increasing the crossover frequency. Further, when thenoise belongs to the low frequency band, the controller 110 may applythe first filter used in the dynamic receiver, which is the first audiomeans, as a Band Pass Filter (BPS) by controlling the audio signalprocessor 310.

Accordingly, as illustrated in FIG. 14, according to another embodimentof the present invention, the band pass filter having a frequencyresponse 1400 cutting the lowest range band is used for the dynamicreceiver, which is the first audio output means 200, and the high passfilter is used for the balanced armature 202, thereby effectivelyreproducing the audio data signal at a surrounding area of an area inwhich the noise in the low frequency band is generated.

The mobile apparatus according to another embodiment of the presentinvention may further include a region determination unit fordetermining a country or a region in which the mobile apparatus ispositioned.

The region determination unit may determine a country or a region inwhich the mobile apparatus is positioned by analyzing information on abase station connected with the mobile apparatus or a carrier by usingthe communication modules 120 and 132 of the mobile apparatus.

The controller 110 may change the crossover frequency by receivinginformation on the country or the region in which the mobile apparatus100 is positioned from the region determination unit, and controllingthe crossover frequency changing unit. For example, a case where thedynamic receiver, which is the first audio output means 200, and thebalanced armature 202 are used is described in detail below.

When the controller 110 receives information indicating that the mobileapparatus is positioned in the United States of America (USA) from theregion determination unit, the controller 110 may more abundantlyreproduce the balanced armature 202 by decreasing the crossoverfrequency, according to a predetermined reference that a user in the USAprefers an audio data signal of a high frequency band. On the contrary,when the controller 110 receives information indicating that the mobileapparatus is positioned in Europe from the region determination unit,the controller 110 may more abundantly reproduce the dynamic receiver,which is the first audio output means 200, by increasing the crossoverfrequency, according to a predetermined reference that a user in Europeprefers an audio data signal of a low frequency band.

In the mobile apparatus including the balanced armature, according toanother embodiment of the present invention, it is possible to changethe crossover frequency by receiving an input for changing the crossoverfrequency from the reproduction frequency band adjustment input unit.

The reproduction frequency band adjustment input unit receives an inputfor adjusting the first reproduction frequency band of the first audiooutput means 200 and the second reproduction frequency band of thebalanced armature 202, as described with reference to FIG. 11. Anadjustment for changing the crossover frequency at which a frequencyresponse of the first filter used for the adjustment of the reproductionfrequency band of the first audio output means 200 crosses a frequencyresponse of the second filter used for the adjustment of thereproduction frequency band of the balanced armature 202 may be inputfrom the reproduction frequency band adjustment input unit. Further, thereproduction frequency band adjustment input unit may receive an inputof the adjustment of the crossover frequency from the user by using thetouch screen. For example, a case where the dynamic receiver, which isthe first audio output means 200, and the balanced armature 202 are usedis described in detail below.

FIGS. 15A and 15B are diagrams illustrating a process of performing anadjustment of a reproduction frequency band, according to an embodimentof the present invention. Referring to FIG. 15A, when a user desires asoft sound, a touch toward the left 1510 may be input through the touchscreen 190 included in the mobile apparatus. If a user desires a clearsound, a touch toward the right 1520 may be input through the touchscreen 190 included in the mobile apparatus. The controller 110 detectsthe input touch, and when the left touch 1510 corresponding to the softsound is detected, the controller 110 expands a frequency response 1540of the low pass filter corresponding to the low frequency band byincreasing a crossover frequency 1530 in a direction 1545, asillustrated in FIG. 15B, to abundantly reproduce the dynamic receivercorresponding to the first audio means 200. On the contrary, when theright touch 1520 corresponding to the clear sound is detected, thecontroller 110 expands a frequency response 1550 of the high pass filtercorresponding to the high frequency band by decreasing the crossoverfrequency 1530 in a direction 1555, as illustrated in FIG. 15B, toabundantly reproduce the balanced armature.

According to another embodiment of the present invention, it is possibleto reproduce an audio data signal desired by the user by receiving aninput for a desired sound from the user and using the plurality of audiooutput means. For example, when the user makes a call using the mobileapparatus, the user may hear a desired audio data signal in accordancewith a tone of a party of the call. When a phone conversation isdifficult, the user may hear a desired audio data signal by adjustingthe tone.

FIG. 16 is a flowchart illustrating a control method of the mobileapparatus, according to an embodiment of the present invention.

Referring to FIG. 16, an audio data signal is input that is reproducedin at least one audio output means and the balanced armature of themobile apparatus, in step 1600.

A first reproduction frequency band of the first audio output means forreproducing a first reproduction frequency band of the audio data signalof the mobile apparatus, and a second reproduction frequency band of thebalanced armature for reproducing a second reproduction frequency bandof the audio data signal of the mobile apparatus, are adjusted by usingat least one filter, in step 1610. At least one filter may performfiltering according to a frequency. For example, the reproductionfrequency band may be adjusted by using the low pass filter in the firstreproduction frequency band of the first reproduction frequency band ofthe first audio output means, and the reproduction frequency band may beadjusted by using the high pass filter in the second reproductionfrequency band of the balanced armature. The first audio output meansreproducing the first reproduction frequency band may be for reproducinga low frequency band, and the balanced armature reproducing the secondreproduction frequency band may be for reproducing the high frequencyband.

The audio data signal is output to the outside of the mobile apparatusby reproducing the first audio output means with the adjusted firstreproduction frequency band and reproducing the balanced armature withthe adjusted second reproduction frequency band, in step 1620.Specifically, the audio data signal is output to the outside of themobile apparatus and provided to the user by reproducing a sound signalby reproducing the first audio output means with the adjusted firstreproduction frequency band and reproducing the balanced armature withthe adjusted second reproduction frequency band.

FIG. 17 is a flowchart illustrating a control method of the mobileapparatus, according to another embodiment of the present invention.

Referring to FIG. 17, an audio data signal is input for reproduction inat least one audio output means and the balanced armature, in step 1700.

A crossover frequency at which a frequency response of a first filterused for an adjustment of a reproduction frequency band of the firstaudio output means crosses a frequency response of a second filter usedfor an adjustment of a reproduction frequency band of the balancedarmature is changed, in step 1710. The frequency response of the firstfilter and the frequency response of the second filter are changed bychanging the crossover frequency.

A first reproduction frequency band of the first audio output means forreproducing a first reproduction frequency band of the audio data signalof the mobile apparatus and a second reproduction frequency band of thebalanced armature for reproducing a second reproduction frequency bandof the audio data signal of the mobile apparatus are adjusted by usingat least one filter, in step 1720. The first reproduction frequency bandof the first audio output means may be adjusted by using the firstfilter changed in step 1710, and the second reproduction frequency bandof the balanced armature may be adjusted by using the second filterchanged in step 1710. The first audio output means reproducing the firstreproduction frequency band may be for reproducing a low frequency band,and the balanced armature reproducing the second reproduction frequencyband may be for reproducing the high frequency band.

The audio data signal is output to the outside of the mobile apparatusby reproducing the first audio output means with the adjusted firstreproduction frequency band and reproducing the balanced armature withthe adjusted second reproduction frequency band, in step 1730.Specifically, the audio data signal is output to the outside of themobile apparatus and provided to the user by reproducing a sound signalby reproducing the first audio output means with the adjusted firstreproduction frequency band and reproducing the balanced armature withthe adjusted second reproduction frequency band.

FIG. 18 is a flowchart illustrating a control method of the mobileapparatus, according to another embodiment of the present invention.

Referring to FIG. 18, an audio data signal is input for reproduction inat least one audio output means and the balanced armature of the mobileapparatus, in step 1800.

It is determined whether to use the first audio output means and thebalanced armature, in step 1810. That is, a use or a non use of thefirst audio each of the first audio output means and the balancedarmature. For example, when it is determined that the first audio outputmeans is used and the balanced armature is not used, the audio datasignal is reproduced and provided to the user only in the first audiooutput means

A reproduction frequency band is adjusted by using at least one filterfor each audio output means determined to be used, in step 1820. The atleast one filter may perform filtering according to a frequency.

The audio data signal is output to the outside of the mobile apparatusby reproducing each audio output means determined to be used in theadjusted reproduction frequency band, in step 1830.

FIG. 19 is a flowchart illustrating a control method of the mobileapparatus, according to another embodiment of the present invention.

Referring to FIG. 19, an audio data signal is input for reproduction inat least one audio output means and the balanced armature of the mobileapparatus, in step 1900.

An input for adjusting a first reproduction frequency band of a firstaudio output means and a second reproduction frequency band of abalanced armature is received, in step 1910. The input may be receivedfrom the user.

The first reproduction frequency band of the first audio output meansfor reproducing the first reproduction frequency band of an audio datasignal of the mobile apparatus and the second reproduction frequencyband of the balanced armature for reproducing the second reproductionfrequency band of the audio data signal of the mobile apparatus areadjusted to the reproduction frequency bands received in step 1910,respectively, by using at least one filter, in step 1920. In this case,at least one filter may perform filtering according to a frequency. Forexample, the reproduction frequency band may be adjusted by using thelow pass filter in the first reproduction frequency band of the firstreproduction frequency band of the first audio output means, and thereproduction frequency band may be adjusted by using the high passfilter in the second reproduction frequency band of the balancedarmature.

The audio data signal is output to the outside of the mobile apparatusby reproducing the first audio output means with the adjusted firstreproduction frequency band and reproducing the balanced armature withthe adjusted second reproduction frequency band, in step 1930.

FIG. 20 is a flowchart illustrating a control method of the mobileapparatus, according to another embodiment of the present invention.

Referring to FIG. 20, an audio data signal is input for reproduction inat least one audio output means and the balanced armature of the mobileapparatus, in step 2000.

The controller 110 determines whether the wide band voice call services,in which a wide band reproduction frequency band is supported, areavailable in the mobile apparatus, in step 2002. The wide bandreproduction frequency band has an audio data signal reproductionfrequency band wider than a narrow band reproduction frequency band.Further, the controller 110 may determine whether voice channelinformation on the audio data signal is the wide band reproductionfrequency band through communication with a base station or determininga carrier by using a communication module or the GPS module included inthe mobile apparatus.

The controller 110 may reproduce the audio data signal through both theaudio output means and the balanced armature, when the wide band voicecall services are available in the mobile apparatus, in step 2004. Forexample, a case where the first audio output means reproducing the firstreproduction frequency band is the dynamic receiver for reproducing alow frequency band, and the balance armature reproducing the secondreproduction frequency band reproduces a high frequency band will isdescribed in detail below.

When the wide band voice call services are available, the reproductionfor a high range frequency band, as well as a low range frequency band,is supported. Accordingly, the controller 110 may reproduce the audiodata signal for both the low range frequency band and the high rangefrequency band by reproducing the audio data signal through both theaudio output means and the balanced armature.

However, the controller 110 may reproduce the audio data signal throughany one of the audio output means and the balanced armature when thewide band voice call services are not available in the mobile apparatus,in step 2006. When the wide band voice call services are not available,reproduction is not supported to all of the low range frequency band andthe high range frequency band, so that it is possible to reproduce theaudio data signal through any one of the audio output means and thebalanced armature.

It may be recognized that the embodiments of the present invention maybe implemented with hardware, software, or a combination of hardware andsoftware. The predetermined software may be stored in a volatile ornonvolatile storage device, such as ROM, a memory, such as RAM, a memorychip, a device, or an integrated circuit, or a storage medium, such as aCD, a DVD, a magnetic disk, or a magnetic tape, which may optically ormagnetically records data and is simultaneously readable by a machine(e.g. a computer). It will be appreciated that the embodiments of thepresent invention may be implemented by a computer or a portableterminal including a controller and a memory, and the memory is oneexample of a machine readable storage medium appropriate for storing aprogram or programs including instructions implementing the embodimentsof the present invention. Accordingly, the present invention includes aprogram including a code for implementing an apparatus and a methoddefined in any claim of the specification, and a machine (a computer,and the like) readable storage medium storing the program. Further, theprogram may be electronically transferred through a predeterminedmedium, such as a communication signal, transmitted through a wired orwireless connection, and the present invention appropriately includes anequivalent thereto.

Further, the mobile apparatus may receive the program from a wired orwirelessly connected program providing device and store the receivedprogram. The program providing device may include a program includinginstructions so as to perform the embodiments of the present invention,a memory for storing information necessary for the embodiments of thepresent invention, a communication unit for performing wired or wirelesscommunication with the mobile apparatus, and a controller fortransmitting a corresponding program to a transmission/reception deviceautomatically or according to a request of the mobile apparatus.

While the present invention has been shown and described with referenceto certain embodiments thereof, it will be understood by those skilledin the art that various changes in form and details may be made thereinwithout departing from the spirit and scope of the present invention asdefined by the appended claims.

What is claimed is:
 1. An audio apparatus comprising: a housingcontaining at least a filter, a first sound device, and a second sounddevice, and including an opening; the filter disposed in the housing andadapted to pass a second frequency band of an audio signal; the firstsound device including a dynamic driver, the dynamic driver disposed inthe housing and adapted to output a first sound corresponding to a firstfrequency band of the audio signal to the outside of the audio devicevia the opening of the housing; and the second sound device including abalanced armature driver, the balanced armature driver disposed in thehousing and adapted to output a second sound corresponding to the secondfrequency band, output by the filter, of the audio signal to the outsidevia the opening of the housing, wherein the first sound and the secondsound are output together through the opening.